Dear prko,
Maybe I misunderstood something, but I think there is no such thing in Dorico as “Pedal Line produces MIDI event”. What could exist, is that a playing technique triggers something, providing there is an expression map that translates that playing technique into something, which might well be a MIDI event (or something else). Question is : what is the probability that someone from the team has build an expression map for a woodwind instrument that would trigger “anything” if a pedal line is used. I’d bet : none. But I’d be glad to be proved wrong 
Hope this helps (a little)!